<?php
// PHP 8 with the cURL extension. Run this on your server.
function env(string $name): string {
    $value = getenv($name);
    if ($value === false || $value === '') throw new RuntimeException('Set ' . $name);
    return $value;
}
try {
    $path = '/v1/invoices';

    $query = [
        'project' => env('CRYPTANIO_PROJECT_ID'),
        'limit' => '50',
    ];
    $url = 'https://api.cryptanio.com' . $path . ($query ? '?' . http_build_query($query, '', '&', PHP_QUERY_RFC3986) : '');
    $headers = [
        'Authorization: ' . 'Bearer ' . env('CRYPTANIO_API_KEY'),
        'Accept: ' . 'application/json',
    ];
    $curl = curl_init($url);
    curl_setopt_array($curl, [
        CURLOPT_CUSTOMREQUEST => 'GET',
        CURLOPT_HTTPHEADER => $headers,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_FOLLOWLOCATION => false,
        CURLOPT_CONNECTTIMEOUT => 10,
        CURLOPT_TIMEOUT => 30,
    ]);
    $response = curl_exec($curl);
    if ($response === false) throw new RuntimeException(curl_error($curl));
    $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    if ($status < 200 || $status >= 300) throw new RuntimeException('HTTP ' . $status . ': ' . $response);
    echo $response;
} catch (Throwable $error) {
    fwrite(STDERR, $error->getMessage() . PHP_EOL);
    exit(1);
}